It doubles as a belt pouch, belt bag, money belt, and waterproof running bag. This running waist belt is your go-to phone belt to keep all important details in it securely. Secure Fit Adjustable Elastic Strap (Free extra length adjuster included):Designed for all body types, this running belt and phone holder for running features an elastic waistband (fits 28.3"–47.2") or less with our length adjuster and Velcro closure for a no-bounce, no-slip fit.